Piston



V. W. PAGE.

PISTON.

APPLICATION FILED JUNE 7, I921.

1,428,492 PatentedSept. 5,1922

W/ TNESSES (gm Denim MCTOEMEw E we is STATES PATENT OFFICE. I

VICTOR W. PAGE, OF NEW YORK, N. Y.

PISTON.

Application filed June 7, 1921 Serial-No. 475,595.

To all whom it may concern:

Be it known that I, VICTOR W. PAGF], a citizen of the United States, and a resident of the city of New York, Kew Gardens, borough of Queens, in the county of Queens and State of New York, have invented a new and Improved Piston, of which the following is a full, clear, and exact description.

The resent invention relates to new and useful lmprovements in internal combustion motors, and it pertainsmore particularly to pistons therefor. 4

i It is one of the primary objects of the present invention to so construct a piston that it-will have expansible sections which serve to force one of the piston rings into contact with the walls of the cylinder when the motor is cold.

-Another object of the invention is to pro vide resilient means for operating the expansible sections of the piston.

It is a further object of the invention to construct a new and novel form of resilient means for expanding the expansible sections of the piston.

It is a still further object ofthe invention to construct a piston in a novel means in order that the resilient expansible means may be retained within said piston.

With the above and other objects in view, reference is had to the accompanying drawings, in which Figure 1 is a longitudlnal'sectional view of a piston constructed in accordance with the present invention;

Fig. 2 is alongitudinal sectional view of the piston, said view being taken at right angles to Fig. 1;

Fig. 3 is a segmental sectional view showing one of the positions of the expansible sections in dotted lines.

Referring more particularly to the drawings, the reference character-5 designates a piston and said piston is provided with ring channels 6 near its upper end and a ring.

channel 7 at its lower end, as in the common form of internal combustion motor pistons.

The inner surface of the piston is provided near the lower end with a shoulder 8, said shoulder being formed in the wall of the piston in the preferred form of the'invention. The inner face of the top of the piston is provided with a channel 9 formed therein and said channel 9 is adapted to receive a spring, 10. This spring 10 is of substantially inverted U-shape and the end of each of the legs is provided with a curved port1on 11. Intermediate the ends of the legs 11, the resilient member is provided with a loop or the like 12, by which resili- .ency is attained, this loop 12 being po- By this construction it is apparent that when the resilient member 10 is placed within the piston with its curved lower ends 11 in engagement with the aprons 17 the said aprons will be expanded and that under the expansion of said aprons 17, a ring mounted in the channel 9v will be forced into engagement with the walls of the cylinder.

As the motoris started and begins to heat up, the resilient aprons .17 are free to assume the normal position since they are free to expand inwardly against the action of the resilient member 10. The curved portions 12 of the legs of the resilient member 10 engage the shoulder 8 formed upon the interior of the piston and prevent accidental displacement of said resilient'member 10, while the engagement of the base of the resilient member 10 with the walls of the channel 9 prevents accidental displacement of the member 10 within the piston and prevents its ends from engaging with'any other portion of the piston than the resilient aprons 17.

From the foregoing it is apparent that the present invention provides a new and improved piston, by means of which the lower rm may cyllnder walls when the motor is cold and the piston consequently in contracted position which ordinarily results in leaks around the piston ring until the motor is warmed be maintained in contact with the up to an extent which expands the piston and rings into engagement with the walls of the cylinder. When, however, the motor is heated up, the resiliency of the aprons that position to which the aprons are moved under the influence of the resilient member 10 while the dotted line position indicates the contraction of which the aprons 17 are capable under the influence of the heat within the motor.

I claim 1. A piston having oppositely disposed resilient portions, and inverted U-shaped resilientmember positioned within the piston and adapted to engage the resilient portions thereof to expand them relatively to the remainder of the piston.

52. A piston formed with resilient portions, and an inverted U-shaped resilient member adapted to engage the resilient portions near their lower ends to expand them relatively to the remainder of the piston.

3. A piston having a body portion and resilient portions, the outer faces of said resilient portions occupying a position normally to the rear of the outer face of the body portion of the piston, and means for expanding said resilient portions for causing them to assume a position wherein their outer faces will be flush with the outer face of the body portion of the piston, substantially as described.

4. In a piston, a plurality of resilient sections formed in the Walls of said piston and a channel extending through the head of the piston upon the interior thereof, and resilient means mounted in the channel and adapted for engagement With the resilient sections, as and for the purpose set forth.

5. Ina piston, a plurality of resilient sections formed in thewalls of said piston and a channel extending through the head of the piston upon the interior thereof, and resilient means mounted in the channel and adapted for engagement with the resilient sections, said resilient means being retained within the piston through the medium of its own resiliency.

6. A hollow piston formed to provide a plurality of oppositely disposed resilient sections, an annular shoulder formed upon the interior of said piston, a channel formed upon the interior of said piston, resilient means mounted within the channel upon the interior of the piston and having its ends engaged with the oppositely disposed resilient sections to expand the same and having its free ends engaged with said annular shoulder to retain the resilient member within the piston through the medium of its own resiliency.

7. A piston cut to provide a rigid body portion and a plurality of resilient sections, and means carried by the body of the piston and adapted to engage the resilient sect-ions near their lower ends to spring the resilient sections relatively to the body of the piston.

8. In a piston, a plurality of resilient sections formed by cutting said piston longitudinally thereof, and an inverted U-shaped spring carried by the piston and having the free ends of its leg portions engaging the resilient sections adjacent their lower ends to spring said resilient sections relatively to the body of the piston, substantially as described.

VICTOR W. PAGE. 

